Boom drive



June 3, 1930.

v vc. E. FooTE Filed Aug. 20, 1928 ...22S 1 Lt/ r. 1 irwm 3 3J. #..Q m 24f..---- .--.i...-11-1.1.- 2---- 4 5 2 d 7 w 2 2 n 6 2 m i 3 2 o0 2u vw.w 7 j, N 1 1 |r 1 w A TTORNE Y.

June 3, 1930.

c. E 1FooTE 1,761,716

BOOM DRIVE Filed Aug. 20, 1928 4 Sheets-Sheet 2 JNVENTR.

ATToRNEY.

Janes, 1930. C, E FOOTE 1. 1,761,716

BOOM DRIVE Filed Aug. 20, 1928 l4 Sheets-Sheet. 3

1 K I N V EN TOR. z 5 1 Q L 1 C7Y2c7rZeSEf'00Ze ATTORNEY.

C. E. FOOTE BOOM DRIVE Filed Aug. 20, 1928 June 3,' 1930.

l W n C/WMEFUOZ@ 09a/U M Patented .lune 3, 1930 PATENT OFFICE CHARLES E.FOOTE, OF 1\l"l'.l'1\`l'D,` NEWV YORK, ASSIGN OR TO THE FOUTE COMPANY,INC., OF NUNDA, NEW YORK, A CORPORATION OF DELAWARE BOOM DRIVEApplication mea August 2o, 192s. serial No. 300,832.

My invention relates to new and use-ful improvements in concrete paversand more especially to the boom drive.

Asis well known to those skilled in the art, concrete pavers aregenerally provided with a boom at their one end, on which travels backand forth a bucket and which bucket receives the aggregates after they'are thoroughly mixed in the drum of the paver, after which the bucketis pulled by a cable out along the boom, the bucket automatically openedand then returned to its starting place.

The drive cable and the mechanism for operating this cable and itsconnection with the bucket is known as the boom drive.

The present invention contemplates new and novel arrangements for themanner of driving the cable and thus the bucket, and especially as usedin conjunctionl with the well known Foote paver.

Still another object of the invention is to provide a boom drive of theplanetary type to thereby provide a smoother action in the driving ofthe bucket and to overcome the sudden impulses or jerking of the bucketwhich is inherent'with the other forms of boom drives.

Still another object of the invention is to provide a boom drive of theplanetary type and to also mount on one of the driving shafts theplanetary arrangement for operating the discharge chute of the mixer.

In two of my former patents, to wit No. 1,356,615 and No. 1,394,160planetary mechanism for the discharge chute is shown and in thoseinstances the planetary mechanism is mounted on the front end of thepaver and at one side thereof. Now one of the objects of the presentinvention is to place this planetary arrangment up over the chute whereit is more conveniently arranged and to mount it on the same shaft thatoperates the planetary boom drive.

Still another object of the invention is to provide a boom driveconsisting of two planetary gear cable drums mounted directly above theinner pivotal end of the boom whereby the cable will run directly fromthe planetary systems downwardly beneath the sheaves mounted on theinner end of the piv` otal boom, and thereby make it unnecessary to usethe ordinary intermediate guide sheaves.

StillV another object of the invention is to provide a very compact andsimple construction that does away with the usual set of bevel gears asthe winding drums revolve at right angles from the winding drums used inthe previous constructions, the aXis of these winding drums beingparallel to the axis of the mixing drum of the paver.

Still another object of the invention is to provide two like planetarycable drums for driving the cable that moves the bucket out along theboom, these planetary cable drums being so arranged that when running,they always run in the same direction with relation toeach other and thecable is so arranged so that as one drum takes up, the other pays off,and either drum may be quickly thrown into operation to thus cause theother drum to follow and drive the bucket j outwardly along the boom orinwardly as desired.

Still another object of the invention is to provide these two planetarycable drums which are normally both idle, with a sprocket chain, so thatwhen one is driving and the other idle they will both be travelling atthe same rate of speed.

Still another object of theV invention is to provide these `twoplanetary cable drums, both operated from one lever and so arranged thateither one maybe quickly thrown into active operation,and` the idle drumin either instance being Aidle in the sense that it is simply beingrotated by the active drum, and of course, in the same direction. Y

With these and other objects in view, the

invention consists of certain new and novel J arrangements andcombination of parts as will be hereinafter more fully pointed out anddescribedin the claims. j

Referring now to the drawings showing a preferred embodiment of the boomdrive f Fig. l is a sectional view taken on line 2 2 of Fig. 2, andshowing the two planetary cable drums and their operative connections,Fig. 2 is a fragmentary front elevation of the boom drive and afragmentary portion of the boom and bucket, the boom being turnedsharply to one side for the sake of elearness of illustration,

Fig. 3 is a fragmentary view of the two planetary cable drums, partsbeing omitted for the sake of clearness of illustration, and showing themanner in which the desired brake drum is applied to actuate either ofthe drums,

Fig. 4 is a side elevation, partly in section, showing the arrangementof the boom drive and also of the planetary discharge chute mechanism,

Fig. 5 is a sectional view on line 5-5 of Fig. 4 and showing the mannerof operating the planetary discharge chute mechanism,

Fig. 6 is a side elevation of the boom, parts being in section and partsbeing removed for the sake of clearness, and showing the threaded cable,and

Fig. 7 is a top plan view of the same.

At the outset it might be mentioned that in Patents No. 1,356,615 andNo. 1,394,160, there is shown two arrangements for a planetary dischargechute mechanism and the present invention contemplates not lonly a newand novel arrangement for the boom drive but also contemplates providingand mounting a planetary discharge chute mechanism up on the drivingshaft of the planetary boom drive.

Referring now more particularly to the several views and to Fig. 2 forthe moment, there is shown the two front uprights 1 that are supportedon the paver frame l (not shown), and it will be understood that thetype of paver is of the well known Foote type, as shown in variouspatents such as No. 1,443,354, No. 1,562,751, etc., there being asupport on which is mounted a caterpillar form of tractor, upon whichsupport is a frame, while on this frame there is mounted the mixing drumand power plant. There is also a skip, the boom and bucket, and meansfor operating the various parts.

Extending across the top to the two uprights is the top frame 2, whilealso extending from the two frames 1, is the large casting 3 which isprovided with the central hollow cylinder 4, which cylinder ispositioned directly over the discharge 5 of the mixing drum (not shown).

Also pivotally mounted to the front of the paver is the boom 6 which isprovided with a segmental gear 7 that is in turn operated by the smallworm shaft 8 on which there is a sprocket 9 operated by the chain 10,which in turn passes over the sprocket 11 and turned by the shaft 12,which latter will be provided with a wheel (not shown) for itsoperation.

On the inner end of the boom 6 are mounted two sheaves 13, which it willbe seen are directly beneath the hollow chamber 4, which chamber it willbe remembered is part of the casting 3, so that the one bight of thecable 14 may pass directly downwardly from one ydrum (about to bedescribed), through the chamber 4 and directly beneath the sheaves 13,where it is connected to a shaft 15 of the bucket door opening andclosing mechanism and then extend outwardly over a sheave 13 at theouter end of the boom and back to the bucket or trolley and then up tothe other drum.

The bucket door opening and closing mechanism is well illustrated in theapplication filed by me on June 15, 1926, and bearing Serial No. 116,126and also the patent to Devinney, No. 1,640,980 shows the form of bucketthat is used with the Foote paver, and it is simply thought necessary tomention here briefly that there is a toggle or throwover connected withthe doors of the bucket whereby when the cable is pulled in onedirection, the bucket will travel outwardly and the doors will remain ina closed position until the cable is reversed, when the doors of thebucket will then be opened, and means may be provided whereby the bucketdoors are closed when the bucket again reaches its inner end of travel.

In Fig. 2 there is shown the connecting arm C that extends down to thelinks which are fastened to the door of the bucket (not shown), and thebucket illustrated may be that of the said Devinney type above menationed, although any of the Foote paver type of buckets may be used.

t will be understood that the present application relates to thearrangement and position of the drive cable and the manner in which itis driven, together with the means employed;v the cable, it will beremembered, functioning to advance and retract the bucket along theboom, and also being connected to the door operating means of thebucket.

Still referring to Fig. 2 there is shown mounted on the boom, thetrolley 16 having the arms 17 that support the Dcvinney bucket 18, onebight of the cable being shown in dotted lines as passing over thesector in one direction and being connected to the rock shaft 15, andthe other bight of the cable passing` over the sector in the otherdirection and connected thereto. his shaft l5 is the one to which thelinks are connected that e:- tend down to the doors of the bucket andvthe sector and its manner of arrangement is the one shown in theapplication above mentioned, to wit, bearing Serial No. 116,126, filedJune 15, 1926.

It is desired that as one bight of the cable travels in one directionand pays oil' a drum that the other bight of the cable be taken up. Thepresent invention contemplates acconplishing this by providing two cabledrums A and B, one portion or bight of the cable being wrapped aroundthe drum A and the other being wrapped around the drum B. These twodrums are centrally positioned at the end of the paver and directlyabove the 1,761,716 Ill vinner pivotal end of the boom and are so ar-These two drums are parts of two planetary systems which will shortly bedescribed more in detail.

Referring now to F ig. 1 there is shown in dotted lines a ringgear 19which is mounted on the mixing drum (not shown) and in turn meshes withthe driven gear 2OV shown in dotted lines, to the far right of thedrawing.

This driven gear 20 is rigidly mounted on the main drive shaft 21, whichshaft isV securely mounted in the upper framework 22 of the paver. Y i

There is a planetary ge-aring system 23 mounted on the shaft 21 foroperating or partly revolving the'discharge chute 5 of the paver, thisplanetary discharge arrangement being very similar to the constructionshown y in the previous mentioned Patents No. 1,356,-

CTI

615 and No. 1,394,160. ln those patents, however, t-he planetarymechanism was mounted on a shaft directly to one-side of the chutedischarge, whereas in the present instance it is mounted above the chutedischarge and on the driving shaft 21 Aas heretofore mentioned. As maybe seen there is a sun gear 24 rigidly mounted on the shaft whichengages the usual planets 25, which meshes with the ring 26, there beingthe holding` brake band 27 and the eccentrically mounted pitman 28,which extends down to the spout or chute of the mixer. n

As iswell known to those familiar with pavers and discharge chutemechanisms, there is generally ,provided a chute which extends up intothe drum of the mixe-r and this is rocked from one position to anotherso that in 'one position, the aggregates in the drum will, as theyapproaea the top of the drum, fall into the discharge chute and bedischarged from the drum, whereas when the discharge chute is rockedwithin the drum to a normal position, the aggregates will fall as beforeastheyapproach the top of the drum, but the chute being to one side, theaggregates will fall to the bottom of the drum and will continue to doso until the chute is rocked hack to a position to catch the aggregatesand discharge them. r

T have simply Outlined the chute in the present drawings as it isthought that it is only necessary to show the chute in outline and thepitman connected thereto, and-it will he understood that when the pitman`is in one position it will hold the discharge chute in its dischargingposition and may be quickly, moved to its opposite position, where thedis` charge chute will be in anV inoperative position.

In Fig. 5 there is shown the means for actuating or operating the brakeon the planetary discharge for the chute comprising the connecting rod29 which is connected to the lever n3() so that when the lever 30 isoperated the brake will be applied and the discharge chute rocked fromone position to the other.

In Fig. 4 there is shown the mounting of the lever 30, this being fixedat its lower end to the shaft 31 while the operating rod 29 is fastenedto the arm 82 on the shaft 31. There is also shown a small spring 33connected to the lever 30 so that the small roller 34 will normally Ybeheld in engagement with one of the notches 35 of the planetary gearing23.

When the handle 30, therefore, is pulled toward the operator (Fig. 4) itwill apply the brake and release the small roller 34 from its notch 35and permit the discharge chute to be rocked through the eccentricmovement of the pitman connected to the discharge chute, as will beclearly understood.

Referring now to a very important feature of the invention, and that isthe boom drive mechanism, there willvhe seen fixedly mounted on thedrive shaft 21, the gear 36, which in turn meshes with gear 37, whichlatter gear ismounted on a short shaft 3S which shaft is mounted in thebearing 39 and in the front top rail 2. Thus a turning movement of theshaft 21 in one direction will turn the shaft 38 in the oppositedirection. It will also be seen in Fig. 1 that th-e cable drum A isvniounted on the shaft 21 and that the cable drum B is g5 mounted on theshaft- 38, Vso that when the drum A is temporarily locked with relationto its shaft 21, it will turn in an anti-clockwise movement and when Bis temporarilyV locked to itsshaft 38, it will turn in a clockwisedirection.

Explaining somewhat more specifically these two cable driving drums, itwill be understood that they are alike and each` a part of the planetarygearing system. Glancing at drum A it Vwill be seen that there is keyedto the drive shaft 21, the sun gear 40, which in turn meshes with theplanets 41, that are respectively mounted on the` short stub shafts 42,which'stub shafts 42 are mounted in a part of the casing or brake drumv43 on the outer side of which is secured the brake band 44, while theplanets also mesh with the internal ring gear 45 that'is a part of thedrum.

From this it will be understood that the drum A is normally idleon theshaft 21, but when the brake band 44 is applied, the drum A is revolvedby the action of the sun gear and planets as the brake drum is heldagainst movement.

Gn the outer surface of the hub 49 of the drum A is keyed the sprocketwheel 46 Vover which thesprocket chain 47 is secured, which also mesheswith the sprocket wheel 48 that is mounted on the hub 49a of theplanetary cable drum B. i

This drum B is identical with the drum A just mentioned, it having thesun gear 50, the planets 51, the brake drum 52 and the brake band 53 andthe internal ring 54, but when locked to its shaft by the brake band itwill turn in the opposite driving direction to drum A.

Through the medium of the sprocket wheels 8G and 37 on the two shafts itwill be understood that the rotation of the drums are always in the samedirection to each other, and both travel at the same rate of speed.

It will be remembered that both drums A and B are normally idle on theirrespective shafts and if drum A is temporarily locked with relation toits shaft it will turn in one direction and cause the drum B which isnormally idle on its shaft, to revolve with it in the same direction.However, should drum B be temporarily locked with relation to its shaft,it will revolve in the opposite direction and cause the drum A to followin the same direction with it.

New, I have shown a means for quickly applying either of the respectivebrake bands 44 and 53. Referring to Fig. 3 it will be seen thehand-lever 55 is loosely mounted at its bottom on the heretoforementioned shaft 31 and has the connecting rod 56 secured thereto, whichrod in turn is pivotally mounted to the small casting 57 which in turnis mounted on the small shaft 58 so that this casting may be rocked'ineither a right or 1'eft-hand direction. The brake band 44 that passesaround the drum A is fastened at its upper end to the pin 59 and at itsother end is buckled to the pin 60. In like manner the brake band 53 ofthe drum B is fastened at its one end to the pin 61 and at its lower endis buckled to the pin 62, these several pins being on the band bra-kehead 63.

In like manner, by a rocking of the lever 55, we will say in aright-hand direction, in Fig. f-l, the brake band about the drum A istightened to thus cause the drum A to revolve, and the drum B being idleon its shaft will, due to the sprockets and chain 47, be revolved in thesame direction to the drum A. Now the two bights of the cable 14 passover the adj acent sides of drums A and B, as will be seen in Fig. 2, sothat as the drum A is functioning and the bucket is moved outwardly, itwill take up the cable on the drum A and the drum B being idled in thesame direction, the other bight of the cable will be paying off of thedrum B. Both drums are grooved for the reception of the turns of thecable.

In the opposite manner, if the lever 55 is forced inwardly, the drum Bwill be thrown into driving operation, which is in the oppositedirection to wind its bight of the cable and the drum A being free toturn in the same direction as its brake band is loose, and will pay offthe cable.

Thus it will be seen that a movement of the lever 55 in one directionwill cause the cable to move the bucket out along the boom, the cable onone cable drum winding` up as the night on the other drum pays olf,while a reverse movement of the lever will cause the drums to functionin the opposite direction and return the bucket inwardly along the boom.

The sector of course will be thrown when the cable is reversed to thusopen the doors of the bucket, but this feature is not a part of thepresent invention and is shown in the pending application abovementioned.

It will be seen that the construction is relatively simple and does awaywith the usual set of bevel gears as these winding drums revolve atright angles from those used in any of the previous Foote constructions.

It also does away with the necessity of any intermediate guiding sheavesfor the cable, as the cables extend directly from the drums down to andover the guiding sheaves on the inner pivotal end of the boom.

It will also be noticed that by using the chains and sprockets that thetwov drums travel at the same rate of speed and when one is driving andwinding up t-he cable, the other is idling and paying off the cable andat the same rate of speed, which will be clearly understood.

Furthermore, it will be understood that there is no heavy impact or jaron the cable when starting or stopping the bucket. This is important asany continuous sudden impact or shock on the cable tends to stretch thesame and makes it necessary to be continuously tightening the cable.

With this planetary cable driving arrangement the starting and stoppingis controlled in a very smooth even manner and thus lengthens the lifeof all of the parts of planetary gearing.

Also, by locating the discharge chute mechanism up on the driving shaftof one of the planetary cable drums, it is out of the way and alsosimplilies the machine and lessens the number of parts.

It is only necessary to have two handles for this chute dischargemechanism and the boomv drive mechanism, and of course, the lesscontrols to operate, the less chance of confusion.

Lastly, it will be seen that the construction is a relatively simple oneand does away with a great number of parts previously employed and atthe same time functions in a simple and smooth manner as will be readilyunderstood from the above description.

Many slight changes might be made without in any way departing from thespirit and scope of the invention.

Having thus described the same, what I claim as new and desire to herebysecure by Letters Patent, is

1. A boom drive for concrete pavers comprising a boom and bucket, acable attached to the bucket for advancing and retracting the same alongthe boom, a planetary driving system including two drums, the inner endsofthe cable attached respectively to the said drums, said drums beingnormally idle, means for selectively driving either of said drums, andthe drums interlocked with each other at all times.

2. A concrete paver having a boom and bucket and a cable extending alongthe boom for advancing and retracting the bucket along theboom, aplanetarydriving system including two driving cable drums horizontallymounted, both normally idle, means for selectively operating either ofsaid drums, the rotary driving direction of the two drums being oppositeto each other and the drums provided with sprockets and connected with achain so that the selected driving drum idles the other of the saiddrums in the same direction as the driving drum so that as part of thecable pays olf one drum it takes up onthe other.

3. A concrete paver having boom and bucket and cable attached to thebucket for advancing and retracting the same along the boom, a planetarydriving system for the bucket comprising two drums for 'driving andretracting the cable, both of said drums being normally idle, thedriving direction of the drums being opposite to each other and thedrums permanently connected by a sprocket chain to each other so that asone drum drives the other drum idles in the same direction so that aspart of the cable pays olf of one drum a part of the cable is taken upon the other drum.

4. A planetary boom drive for concret-e pavers, including drums planetsand sun gears operably connected with said drums, and a cable, its innerends wrapped respectively around the two said drums, the said drumsbeing horizontally mounted, a boom and bucket, said cable extendingalong the boom to the bucket for driving the bucket out and back alongthe boom, the driving direction of the drums being opposite to eachother, means for selectively driving either of the said drums andinterconnecting means between the two drums for causing the driving drumto cause the idle drum to turn in the same direction and at the samerate of speed, whereby as one drum pays off the other` drum takes up thecable.

5. A boom drive for concrete pavers comprising a boom, a trolley on theboom and a bucket carried by the trolley, a cable passing out along theboom andrconnectedto the said trolley. means for driving the cablecomprising a driving shaft and a planetary driving system including adrum idly mounted on said shaft, a stub shaft and means for driving thestub shaft in the opposite direction from the driving shaft, a secondcable drum on the said stub shaft, means for selectively causing eitherone 0f the drums to drive, and endless means connecting the two drumstogether so that as one drum drives the other drum idles in the samedirection and vice versa, and as one drum pays off the cable the otherdrum takes up the cable.

6. A concrete paver comprising boom and bucket, planetary means fordriving and retracting the bucket along the boom, comprisa cable, andtwo driving drums horizon? tally mounted above the boom, one foradvancing the bucket and the other for retracting the bucket, means forselectively driving eitherofthesaiddrums,and sprocketandchain means forpositively interconnecting the two drums to each other for causing theidle drum to idle in the same direction as the driven drum, whereby asthe cable pays off one drum, it takes up on the other.

7. A boom drive for concrete pavers comprising a boom and a bucket and acable, said cable connected to the said bucket, a plann etary drivingsystem including a cable drum having one end of the cable wound aroundthe said drum and the said drum adapted to drive the cable and bucket inone direction, a second drum having the other end of the cable attachedthereto and adapted to drive the cable and bucket in the otherdirection, means forV selectively operating either of the said drums,and chain and sprocket means connecting the drums whereby when one drumdrives the other drum idles in the same direction and as the cable takesup the one drum it pays oil:1 the other drum.

8. A concrete paver having a boom pivotally mounted at its inner end onthe paver, guide sheaves on the inner pivotal end, and a guide sheave atthe outer end of the boom, a planetary driving system including twodrums mounted on the paver directly over the pivotal end of the boom, acable secured to said drums and extending directly from the surface ofthe drums to beneath the sheaves on the inner pivotal end of the boomand extendingout along the boom over the sheave at the outer end of theboom, a bucket mounted on the boom and connected with the cable, one ofthe said drums for driving the cable and bucket outwardly and the otherof said drums for moving the bucket inwardly, and means for selectivelyoperating either of the said drums.

9. A concrete paver comprising a boom pivotally mounted at its innerend, a bucket mounted thereon, sheaves atvthe inner pivotal end of theboom, a planetary driving system including two drums mounted directlyover the inner end of the` boom, a cable connect-ed to said bucket andoperated by either of the said two drums for alternately driving thebucket inwardly and outwardly, and the cable passing directly from theperiphery of theV drums down to and over the sheaves on the inner end ofthe said boom.

10. A concretepaver having a boom pivotally mounted at the forward endof the paver, a bucket mounted on said boom for inward and outwardtravel thereon, a cable for actuating said bucket, a planetary drivingsystem including two drums for driving said cable and mounted on thesaid paver directly above said boom, and the axes of the said drumsbeing parallel with the axis of the mixing drum of the paver, the cablehaving its inner ends secured to the said drums and passing over theadjacent faces of the said drums, sheaves on the inner pivotal end ofthe 10 boom and a cable passing directly from said sheaves up to andover said drums, and means for selectively operating either of the saiddrums to move the bucket inwardly and outwardly on the said boom.

ll. A concrete paver having a boom and bucket, a cable attached to saidbucket, a planetary driving system including a drum for driving thebucket outwardly and a separate drum in said system for pulling thebucket inwardly and said drums being externally interconnected at alltimes, a driving and a driven shaft for operating bot-h of said drumsand said driving shaft adapted to be driven directly from the ring gearof the mixer.

12. A boom drive for concrete pavers comprising a planetary drivingsystem including two cable driving drums, said drums mounted adjacent toeach other and the axes of said drums extending longitudinally of themixer and externally interconnected.

13. A concrete paver having a boom and bucket and a planetary gearingsystem, drums in the system for operating the bucket on the boom, acable passing up and over the adjacent faces of the drums, chain andsprocket means extending across the outer faces ofthe drums for causingsaid drums to always rotate in the same direction with relation to eachother so that as one drum pays off the other drum takes up the cable,said drums selectively operatively driven and means for selectivelyoperating either of said drums.

14. A concrete paver having a boom pivotally mounted at the inner end ofthe said paver, sheaves at the inner end of the boom and a sheave at theouter end of the boom, a planetary driving system including two drums, abucket travelling on said boom, a

hollow chamber directly above said sheaves and said cable passing oversaid inner sheaves through said chamber and directly over the face ofthe drums, said drums adapted t-o selectively drive the bucket in theopposite directions, means for selectively operating either of saiddrums and means for causing the idle drum to travel in the samedirection as the driven drum.

In testimony whereof I aiiix my signature.

60. CHARLES E. FOUTE.

